Copper-Catalyzed Aza-Michael Addition of Aromatic Amines or Aromatic Aza-Heterocycles to α,β-Unsaturated Olefins
作者:Seongcheol Kim、Seongil Kang、Gihyeon Kim、Yunmi Lee
DOI:10.1021/acs.joc.6b00341
日期:2016.5.20
A highly efficient and mild Cu-catalyzed conjugate addition reaction of aromaticamines and aromatic aza-heterocycles to α,β-unsaturated olefins is described. The transformation is promoted by 3–7 mol % of a Cu complex generated in situ from a mixture of inexpensive CuCl, a readily available phosphine or imidazolium salt, and KOt-Bu at ambient temperature. A wide range of β-amino sulfone, β-amino nitrile
描述了芳族胺和芳族氮杂杂环对α,β-不饱和烯烃的高效且温和的Cu催化的共轭加成反应。在环境温度下,由廉价的CuCl,易得的膦或咪唑鎓盐和KO t -Bu的混合物原位生成的3–7 mol%的Cu络合物促进了这种转变。可以高效,有选择地合成大量β-氨基砜,β-氨基腈和β-氨基羰基化合物(62–99%)。
Lithium tetrafluoroborate catalyzed highly efficient inter- and intramolecular aza-Michael addition with aromatic amines
Abstract Lithium tetrafluoroborate has been demonstrated for the first time to be an efficient catalyst in intermolecular aza-Michael addition aromatic amines to electron deficient alkenes. Suitability of the same catalyst in intramolecular aza-Michael addition leading 2-aryl-2,3-dihydroquinolin-4(1H) ones has also been described.
Highly efficient aza-Michael reactions of aromatic amines and N-heterocycles catalyzed by a basic ionic liquid under solvent-free conditions
作者:Lei Yang、Li-Wen Xu、Wei Zhou、Lyi Li、Chun-Gu Xia
DOI:10.1016/j.tetlet.2006.08.103
日期:2006.10
A task-specific basic ionicliquid, [Bmim]OH, has been introduced as a catalyst for the aza-Michaeladdition of aromaticamines and N-heterocycles to cyclic or acyclic ketones under neat conditions. The catalyst can be recycled for subsequent reactions without any appreciable loss of efficiency.
Reactions of Alkyl Azides and Ketones as Mediated by Lewis Acids: Schmidt and Mannich Reactions Using Azide Precursors
作者:Pankaj Desai、Klaas Schildknegt、Konstantinos A. Agrios、Craig Mossman、Gregory L. Milligan、Jeffrey Aubé
DOI:10.1021/ja000490v
日期:2000.8.1
variation of the Mannichreaction. The scope of each of these reactions, the dependence of the observed products upon azide and ketone structure, and the nature of acid promotion are discussed. In broad strokes, cyclohexanones and other cyclic ketones react in the presence of TiCl4 to afford insertion products, whereas the Mannich route predominates when benzyl azide and triflic acid are used. The features
A strategy for one-pot synthesis of isoindoles is described via a catalytic multicomponent dehydrogenative annulation of diarylimines, vinyl ketones and simple amines. In the presence of a rhodium catalyst and Cu oxidant, four C–H and two N–H bonds are activated along with the formation of one new C–C and two new C–N bonds, leading to a series of isoindole derivatives in good to very high isolated